Silicon Carbide Bricks

The main content of silicon carbide bricks is SIC, and its content reaches 72%-99%. Silicon carbide refractory bricks can be combined with clay, oxide, and silicon nitride in different ways. The characteristics of its response and the industry of application are also different.

Silicon carbide brick

Item	Bonding Type
	Clay	Mullite	SiO2	Si3N4	Sialon	β-SiC	R-SiC	Siliconizing reaction
SiC  %	＞85	＞70	≥90	≥72	≥71	≥94	≥99	≥80
Si3N4  %	/	/	/	≥20	/	/	/	/
Al2O3  %	/	/	/	/	≥5	/	/	/
Si  %	/	/	/	/	≥5.5（N）	/	/	12~18
Bulk Density  g/cm3	2.5~2.6	2.55~2.65	2.6~2.7	≥2.65	≥2.65	≥2.63	≥2.65	≥3.0
Apparent porosity  %	≤20	≤16	≤15	≤16	≤16	≤17	≤15	≤0.5
Flexural strength at room temperature  MPa	≥20	≥25	≥25	≥45	≥45	≥30	≥90	≥220
Flexural strength at high temperature  MPa 1400℃	/	/	/	≥45	≥45	≥30	≥90	≥240
Cold Crushing strength  MPa	≥100	≥100	≥120	≥160	≥150	≥140	≥300	≥800

Features of silicon carbide bricks

1. Corrosion resistance
2. Slightly large
3. Good thermal conductivity
4. Strong impact resistance
5. Low thermal expansion coefficient is a high-quality high-temperature resistant material

Types of silicon carbide bricks

Classification by combination method

Silicon carbide refractory bricks can be divided into clay-bonded silicon carbide bricks, β-silicon carbide bonded silicon carbide bricks, silicon oxynitride bonded silicon carbide bricks, silicon nitride bonded silicon carbide bricks, and Sialon bonded silicon carbide bricks according to different bonding methods.

Classification by chemical content

According to the different contents of chemical components, silicon carbide bricks are mainly divided into oxide-bonded silicon carbide bricks, green silicon carbide bricks, corundum silicon carbide bricks, mullite silicon carbide bricks, and high alumina silicon carbide bricks.

Application of silicon carbide brick

1. Used in the metallurgical industry
   The metallurgical industry mainly uses aluminum melting furnaces for aluminum alloy smelting, secondary tuyere bricks for blast furnaces, etc.
2. Used in the power industry
   In the power industry, it is mainly used in boilers and is set at the nozzle of the boiler combustion chamber.
3. Used in the waste disposal industry
   Silicon carbide bricks can also be used in waste incinerators

Rongsheng company introduction

Rongsheng Company is a professional supplier of refractory materials, with 10 years of export experience, exporting to more than 80 countries. The main products of Rongsheng Company include various refractory bricks, unshaped refractory materials, metallurgical materials, thermal insulation materials, and so on.

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